Learning Forum

[Akram Akrout akram.akrout]

Hello

I used the example and I had modified the geometry and set up.

I am confused when modifing the EME please compare group 1 and group 2 in attached file.

I have modified the cell group span from 0.16 to 0.2 micron to fit my geometry and I got no filtring effect however I keep it to 0.16 it's working but it doesn't make sense from since ports are not located at the appropriate cells

Many Thanks

[Guilin Sun]

 

Hi, EME works from cells.  The modes are calcualted at the center of the cell. the xspan of EME is the period. I would suggest that you make sure the cell centers are at the center of grating teeth and etch and modify the teeth and etch width to be 0.2um.

 

[Akram Akrout akram.akrout]

Hi, The period is 0.4 and each cell 0.2 micron and as you can see from the screenshot, the EME setup is at the center of the grating

[Guilin Sun]

Not every value of the periodicity will have resonance. You need to optimize it.

[Akram Akrout akram.akrout]

of course we had resonnance for this period... do some basic analythic calcul: here the resonnance depend on period and effective index. I changed the matrial and so the effective index thereofore I changed the period to get resonnance. 

 

[Akram Akrout akram.akrout]

and optimize what? at least be more specific. if this example work under specific condition please specify.

Tank you in advance

[Guilin Sun]

Sorry reply you late as we had two-day special events.

You can optimize peiodicity, duty cyle, and even the grating teeth depth.

Every device works at its best with certain ranges of parameters.